Are you sure its the motor that is bad? And not a failed run capacitor? If the motor wont start and is humming, generally speaking more often than not its a failed run capacitor. Its the silver thing on the side of the blower with two wires coming off it. If its swollen or mushroomed then its bad. Thats the cheapest way to go first. IF that does not solve the issue. I would pull the OEM motor get the HP rating and RPM rating and volatge. I would suggest getting a universal blower motor. It probably going to be a belly band motor 115V 3/4 HP with a matching run capacitor. Thats important when you purchase the new motor that you have the right run capacitor for the motor. The new motor should tell you what size run cap it needs. You should be able to get the whole setup for under 150 bucks. If you want to try and just replace the run capacitor first, your going to need to pull the old off off look at the numbers what your looking for is the MFD rating and Volts. It should be something like 5MFD / 370V. Its two wires and does not matter what wire goes on what side. Easy to change out. Just make sure power is off when you check and replace.
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An hvac supply store will sell one, maybe 100 dollars. You need to buy the run capacitor that goes with it, too.
If you have set the thermostat to fan only, and the fan does not come on, it could be a burned transformer.
You will need a multimeter to correctly tell what is wrong rather than just start replacing components and guessing.
Are you sure its the motor that is bad? And not a failed run capacitor? If the motor wont start and is humming, generally speaking more often than not its a failed run capacitor. Its the silver thing on the side of the blower with two wires coming off it. If its swollen or mushroomed then its bad. Thats the cheapest way to go first. IF that does not solve the issue. I would pull the OEM motor get the HP rating and RPM rating and volatge. I would suggest getting a universal blower motor. It probably going to be a belly band motor 115V 3/4 HP with a matching run capacitor. Thats important when you purchase the new motor that you have the right run capacitor for the motor. The new motor should tell you what size run cap it needs. You should be able to get the whole setup for under 150 bucks. If you want to try and just replace the run capacitor first, your going to need to pull the old off off look at the numbers what your looking for is the MFD rating and Volts. It should be something like 5MFD / 370V. Its two wires and does not matter what wire goes on what side. Easy to change out. Just make sure power is off when you check and replace.
Here is a site I found for generic universal motors http://www.hvacpartsoutlet.com/universalreplacemen...
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